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(Lianja) Send a Signed Email using RSASSA-PSS with SHA256

Demonstrates how to sign and send an email using the RSASSA-PSS signing algorithm with the SHA256 hash algorithm.

Note: This example requires Chilkat v9.5.0.67 or greater.

Chilkat Lianja Extension Download

Chilkat Lianja Extension

//  This example requires the Chilkat Email API to have been previously unlocked.
//  See Unlock Chilkat MailMan for sample code.

//  Get a digital certificate with private key from a .pfx
//  (Chilkat has many different ways to provide a cert + private key for siging.
//  Using a PFX is just one possible option.)
loPfx = createobject("CkPfx")
llSuccess = loPfx.LoadPfxFile("qa_data/rsassa-pss/privatekey.pfx","PFX_PASSWORD")
if (llSuccess <> .T.) then
    ? loPfx.LastErrorText
    release loPfx
    return
endif

loEmail = createobject("CkEmail")

//  Create a simple email.
loEmail.Subject = "Sample RSASSA-PSS Signed Email"
loEmail.Body = "Sample RSASSA-PSS Signed Email"
loEmail.From = "from_name@mydomain.com"
//  Add one ore more recipients..
loEmail.AddTo("Chilkat Support","support@chilkatsoft.com")
loEmail.AddTo("Chilkat GMail","chilkat.support@gmail.com")

//  Indicate that the email is to be signed, and that we want to use RSASSA-PSS.
loEmail.SendSigned = .T.
loEmail.SigningAlg = "pss"
loEmail.SigningHashAlg = "sha256"

//  Get the certificate to be used for signing.
//  (The typical case for a PFX is that it contains a cert with an associated private key,
//  as well as other certificates in the chain of authentication.  The cert with the private
//  key should be in the first position at index 0.)
loCert = loPfx.GetCert(0)
if (loPfx.LastMethodSuccess <> .T.) then
    ? loPfx.LastErrorText
    release loPfx
    release loEmail
    return
endif

//  Tell the email object to use this cert (and private key) for signing.
loEmail.SetSigningCert(loCert)
release loCert

loMailman = createobject("CkMailMan")

//  Set the SMTP settings for your email account on your mail server.
loMailman.SmtpUsername = "SMTP_LOGIN"
loMailman.SmtpPassword = "SMTP_PASSWORD"
loMailman.SmtpHost = "MY_SMTP_DOMAIN_OR_IP"
loMailman.SmtpPort = 587
loMailman.StartTLS = .T.

//  Send the email.  The mailman will sign the email as directed by the
//  property settings of the email object.
llSuccess = loMailman.SendEmail(loEmail)
if (llSuccess <> .T.) then
    ? loMailman.LastErrorText
    release loPfx
    release loEmail
    release loMailman
    return
endif

llSuccess = loMailman.CloseSmtpConnection()
if (llSuccess <> .T.) then
    ? "Connection to SMTP server not closed cleanly."
endif

? "Mail Sent!"

//  -----------------------------------------------------------
//  This is the MIME of the RSASSA-PSS signed email that was sent

//  	MIME-Version: 1.0
//  	Date: Thu, 20 Apr 2017 10:14:58 -0500
//  	Message-ID: <3682A87344CB3A4FB5EB5BC9908C0C4DA01DA461@CHILKAT13>
//  	Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha256;
//  	 boundary="------------050103020705000601010800"
//  	X-Priority: 3 (Normal)
//  	Subject: Sample RSASSA-PSS Signed Email
//  	From: support@chilkatsoft.com
//  	To: "Chilkat Support" <support@chilkatsoft.com>,
//  	 "Chilkat GMail" <chilkat.support@gmail.com>
// 
//  	--------------050103020705000601010800
//  	Content-Type: text/plain; format=flowed
//  	Content-Transfer-Encoding: 7bit
// 
//  	Sample RSASSA-PSS Signed Email
//  	--------------050103020705000601010800
//  	Content-Transfer-Encoding: base64
//  	Content-Type: application/pkcs7-signature; name="smime.p7s"
//  	Content-Disposition: attachment; filename="smime.p7s"
// 
//  	MIIG5wYJKoZIhvcNAQcCoIIG2DCCBtQCAQExDzANBglghkgBZQMEAgEFADALBgkqhkiG9w0BBwGg
//  	ggL4MIIC9DCCAl2gAwIBAgIJAMPsJCT11cniMA0GCSqGSIb3DQEBCwUAMIGSMQswCQYDVQQGEwJB
//  	VTERMA8GA1UECAwIVmljdG9yaWExEjAQBgNVBAcMCU1lbGJvdXJuZTEhMB8GA1UECgwYSW50ZXJu
//  	ZXQgV2lkZ2l0cyBQdHkgTHRkMQ8wDQYDVQQDDAZXaWRnZXQxKDAmBgkqhkiG9w0BCQEWGWFkbWlu
//  	QGludGVybmV0d2lkZ2V0cy5jb20wHhcNMTYxMTAxMTY1MjMyWhcNMjExMDMxMTY1MjMyWjCBkjEL
//  	MAkGA1UEBhMCQVUxETAPBgNVBAgMCFZpY3RvcmlhMRIwEAYDVQQHDAlNZWxib3VybmUxITAfBgNV
//  	BAoMGEludGVybmV0IFdpZGdpdHMgUHR5IEx0ZDEPMA0GA1UEAwwGV2lkZ2V0MSgwJgYJKoZIhvcN
//  	AQkBFhlhZG1pbkBpbnRlcm5ldHdpZGdldHMuY29tMIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKB
//  	gQDGIdoCjyavs+F/Rm0VIB4m6O7VL1j+1IqieoR9NEX2GQvu2VCdceyxf9qaw1bxipEvjLwUkw7M
//  	e+BTlLpWQbBMH87s6KpsC8MVyXhMLpP0oM8NFix/vLz2wdLhUh7CZvJA0plqkJk9bj57QIu+EO1k
//  	tUHM2DFb6sckvCL2yybD1wIDAQABo1AwTjAdBgNVHQ4EFgQUONKKu2zsXIrinWxIGT654vrcQwsw
//  	HwYDVR0jBBgwFoAUONKKu2zsXIrinWxIGT654vrcQwswDAYDVR0TBAUwAwEB/zANBgkqhkiG9w0B
//  	AQsFAAOBgQArFvdi5u9i2QF1Qw+cdC1l7w2Y3+q6RIkln2W8rWJFje00644o8hXy7v46giJCedmF
//  	ULlhm1n7XIsZGy2W3lJ77v5agn9gFwXu1h3cqkGXkoteE6SQJQXWgsW3GWPveObvTL8LF4y57fgM
//  	9ZWS+V9MJajeu44Rf/tU17TLYKjvEjGCA7MwggOvAgEBMIGgMIGSMQswCQYDVQQGEwJBVTERMA8G
//  	A1UECAwIVmljdG9yaWExEjAQBgNVBAcMCU1lbGJvdXJuZTEhMB8GA1UECgwYSW50ZXJuZXQgV2lk
//  	Z2l0cyBQdHkgTHRkMQ8wDQYDVQQDDAZXaWRnZXQxKDAmBgkqhkiG9w0BCQEWGWFkbWluQGludGVy
//  	bmV0d2lkZ2V0cy5jb20CCQDD7CQk9dXJ4jANBglghkgBZQMEAgEFAKCCAjQwGAYJKoZIhvcNAQkD
//  	MQsGCSqGSIb3DQEHATAcBgkqhkiG9w0BCQUxDxcNMTcwNDIwMTUxNDU4WjAvBgkqhkiG9w0BCQQx
//  	IgQgoHOtpFiAgti0cwDw46C8wyYSZbhx2yJqJZ/qRE8WPSQwXwYJKoZIhvcNAQkPMVIwUDALBglg
//  	hkgBZQMEAQIwCgYIKoZIhvcNAwcwDgYIKoZIhvcNAwICAgCAMA0GCCqGSIb3DQMCAgFAMAcGBSsO
//  	AwIHMA0GCCqGSIb3DQMCAgEoMIGxBgkrBgEEAYI3EAQxgaMwgaAwgZIxCzAJBgNVBAYTAkFVMREw
//  	DwYDVQQIDAhWaWN0b3JpYTESMBAGA1UEBwwJTWVsYm91cm5lMSEwHwYDVQQKDBhJbnRlcm5ldCBX
//  	aWRnaXRzIFB0eSBMdGQxDzANBgNVBAMMBldpZGdldDEoMCYGCSqGSIb3DQEJARYZYWRtaW5AaW50
//  	ZXJuZXR3aWRnZXRzLmNvbQIJAMPsJCT11cniMIGzBgsqhkiG9w0BCRACCzGBo6CBoDCBkjELMAkG
//  	A1UEBhMCQVUxETAPBgNVBAgMCFZpY3RvcmlhMRIwEAYDVQQHDAlNZWxib3VybmUxITAfBgNVBAoM
//  	GEludGVybmV0IFdpZGdpdHMgUHR5IEx0ZDEPMA0GA1UEAwwGV2lkZ2V0MSgwJgYJKoZIhvcNAQkB
//  	FhlhZG1pbkBpbnRlcm5ldHdpZGdldHMuY29tAgkAw+wkJPXVyeIwPQYJKoZIhvcNAQEKMDCgDTAL
//  	BglghkgBZQMEAgGhGjAYBgkqhkiG9w0BAQgwCwYJYIZIAWUDBAIBogMCASAEgYCDQpT6vJZ9zERJ
//  	JVX69PGUfCN5Eq9pKzoOTQSrIBe1YgNDSPd5pyOPP2MN1RpI0T/GTQZw4iWy5LZq0T5sjmk3fFVB
//  	+VZjKtkTuhGaCdzMQXomVLBbI2fN4UaA4v1/Ayrqr8SY9Rsa20TpKv/bufK7oYs083UOtlcA1EHY
//  	41wQ5A==
// 
//  	--------------050103020705000601010800--


release loPfx
release loEmail
release loMailman

 

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